Good Sam Club Open Roads Forum: Boondocking and working with no electricity
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 > Boondocking and working with no electricity

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2oldman

NM

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Posted: 03/15/21 12:22pm Link  |  Quote  |  Print  |  Notify Moderator

valhalla360 wrote:

The problem is when at 50%, you can dump quite a few amps into them but as you get up around 80%, the batteries, simply won't accept as many amps...slowly tapering down until the last 5-10% takes hours at a very slow charge rate.
Which is why, if your wallet can stand it, Li's are nice. And, they don't care if they're not fully charged.

I've seen my AGMs take up to 24 hours to charge to 100% at home. Virtually impossible on a generator.

Lwiddis

Owens River area

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Posted: 03/15/21 12:29pm Link  |  Quote  |  Print  |  Notify Moderator

". Now the question is im not sure how long i can work per day with working off the house battery for my monitor."

Do an energy use survey to determine how many 12 volt amps you use per day. Multiply by 1.5. You'll need batteries with at least twice that number. Three times is better. Recharge with solar most days. Otherwise use your generator.


Winnebago 2101DS TT & 2020 Chevy Silverado 1500 LTZ Z71, WindyNation 300 watt solar-Lossigy 200 AMP Lithium battery. Prefer boondocking, USFS, COE, BLM, NPS, TVA, state camps. Bicyclist. 14 yr. Army -11B40 then 11A - (MOS 1542 & 1560) IOBC & IOAC grad


valhalla360

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Posted: 03/15/21 01:55pm Link  |  Quote  |  Print  |  Notify Moderator

2oldman wrote:

valhalla360 wrote:

The problem is when at 50%, you can dump quite a few amps into them but as you get up around 80%, the batteries, simply won't accept as many amps...slowly tapering down until the last 5-10% takes hours at a very slow charge rate.
Which is why, if your wallet can stand it, Li's are nice. And, they don't care if they're not fully charged.

I've seen my AGMs take up to 24 hours to charge to 100% at home. Virtually impossible on a generator.


Lithium are nice but expensive and muck it up and you can quickly destroy them. I'd add a solar system first but since the OP doesn't wan to do that, keep it simple. $100 for an extra battery and some cables and you negate the issue for the most part. Since he'll be going back to a regular park periodically, they will get a full charge regularly to stay happy.


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wopachop

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Posted: 03/15/21 02:16pm Link  |  Quote  |  Print  |  Notify Moderator

Cheap route would be a 400w inverter from Amazon plugged into a cig adapter.

Start genny as needed. Add a larger battery bank if you can when the current battery ages out.

2oldman

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Posted: 03/15/21 02:42pm Link  |  Quote  |  Print  |  Notify Moderator

valhalla360 wrote:

Lithium are nice but expensive and muck it up and you can quickly destroy them.
Don't muck it up and they are nice.

DrewE

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Posted: 03/15/21 03:40pm Link  |  Quote  |  Print  |  Notify Moderator

A typical laptop battery is somewhere in the vicinity of 50-100 Wh. A pair of GC2 batteries has a usable capacity of roughly 1300 Wh. You could run the laptop for maybe a work week if you're lucky with no other loads on the GC2s with a DC-DC laptop power supply (i.e. a car adapter). Amazon, etc. have some generic car adapters that work and are not at all expensive.

Even with a single 12V house battery, and modest other house loads, you probably could work for a day with a car adapter powered by the house battery without needing the generator.

(Do remember, if using a car adapter or inverter connected to a lighter socket, that the dashboard lighter sockets are almost certainly connected to the chassis battery rather than the house battery.)





time2roll

Southern California

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Posted: 03/15/21 03:44pm Link  |  Quote  |  Print  |  Notify Moderator

2oldman wrote:

valhalla360 wrote:

Lithium are nice but expensive and muck it up and you can quickly destroy them.
Don't muck it up and they are nice.
The BMS will protect them and 280 usable Ah for $600 does not seem that expensive.


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MEXICOWANDERER

las peƱas, michoacan, mexico

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Posted: 03/15/21 04:27pm Link  |  Quote  |  Print  |  Notify Moderator

LED lighting. Direct 12vdc to 19vdc laptop charger. A single solar panel.

qtla9111

Monterrey, Mexico

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Posted: 03/15/21 06:14pm Link  |  Quote  |  Print  |  Notify Moderator

100W solar panel $100 or less
MPPT Controller $50-$100
Xantrax Inverter 600W $160
Add another battery $90

For around $400 or less you can have a decent solar setup. Mine is a 235W panel, MPPT controller 30A, two 6V lead acid batteries and a Xantrax 600W inverter.

Works great and took us on a 4 1/2 month trip through the U.S. and Canada. Never did without power.


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Almot

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Posted: 03/15/21 06:33pm Link  |  Quote  |  Print  |  Notify Moderator

smarty wrote:

You will be surprised to learn how long you will have to run you genny to charge your house battery to full every day.

Yep. The best kept secret of generator users [emoticon]... When it's not charged fully every day and not equalized once a week, it won't last long.

Definitely he needs a bigger battery bank. The cycle will become shallow-er, this will extend battery life while also making long laptop hours possible. LED interior lights is a must for a boondocker, costs less then $2 per bulb to upgrade.

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